@elonmusk: “Try to be as useful as possible.

“It may sound trite, but it’s so hard to be useful, especially to be useful to a lot of people, where you say the area under the curve of total utility is how useful have you been to your fellow human beings times how many people?

‘It’s almost like the physics definition of true work.

“It’s incredibly difficult to do that.

“And I think if you aspire to do true work, your probability of success is much higher.

“Don’t aspire to glory, aspire to work.”